diff --git a/inc/hgl/graph/VKPhysicalDevice.h b/inc/hgl/graph/VKPhysicalDevice.h
index 4689b5b3..91f0d229 100644
--- a/inc/hgl/graph/VKPhysicalDevice.h
+++ b/inc/hgl/graph/VKPhysicalDevice.h
@@ -92,8 +92,8 @@ public:
     bool IsColorAttachmentBuffer(const VkFormat format)const{return BufferSupport(format,VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BIT);}
     bool IsDepthAttachmentBuffer(const VkFormat format)const{return BufferSupport(format,VK_FORMAT_FEATURE_DEPTH_STENCIL_ATTACHMENT_BIT);}
     
-    VkFormat GetDepthFormat(bool lower_to_high=true)const;
-    VkFormat GetDepthStencilFormat(bool lower_to_high=true)const;
+    VkFormat GetDepthFormat(bool lower_to_high=false)const;
+    VkFormat GetDepthStencilFormat(bool lower_to_high=false)const;
 
 public: